name: Create Release

on:
    push:
        branches:
            - main
        paths:
            - 'package.json'
    workflow_dispatch: # Allows manual execution of the workflow.

jobs:
    build:
        runs-on: ubuntu-latest
        steps:
            - name: Checkout
              uses: actions/checkout@v4
              with:
                  fetch-depth: 0

            - name: Set up Node.js
              uses: actions/setup-node@v4
              with:
                  node-version: '20.8.0'

            - name: Install Dependencies
              run: npm install

            - name: Run Tests
              run: npm run test:verbose

            - name: Build the Project
              run: npm run build:tsc

            - name: Get the version
              id: get_version
              run: |
                  VERSION=$(npm run version:show | tail -n 1)
                  echo "VERSION=$VERSION" >> $GITHUB_ENV
              shell: bash

            - name: Get previous release tag
              id: get_previous_release
              run: |
                  echo "Fetching previous release tag..."
                  previous_tag=$(git describe --tags --abbrev=0 HEAD^ 2>/dev/null || echo "")
                  if [ -z "$previous_tag" ]; then
                    echo "No previous tag found, using initial commit."
                    previous_tag=$(git rev-list --max-parents=0 HEAD)
                  fi
                  echo "Previous tag: $previous_tag"
                  echo "PREVIOUS_TAG=$previous_tag" >> $GITHUB_ENV
              shell: bash

            - name: Check if version changed
              id: check_version
              run: |
                  if [ "${{ env.VERSION }}" == "${{ env.PREVIOUS_TAG }}" ]; then
                    echo "Version has not changed. No release will be created."
                    exit 1
                  fi
              shell: bash

            - name: Generate release notes
              id: generate_notes
              run: |
                  echo "Generating release notes from ${{ env.PREVIOUS_TAG }} to HEAD..."
                  repo_url=$(git config --get remote.origin.url)
                  notes=$(git log ${{ env.PREVIOUS_TAG }}..HEAD --pretty=format:"- [\`%h\`]($repo_url/commit/%H): %s%n")
                  echo "Release notes:"
                  echo "$notes"
                  echo "### Changes in this release" > release_notes.md
                  echo "$notes" >> release_notes.md
              shell: bash

            - name: Create temporary branch
              id: create_temp_branch
              run: |
                  git checkout --orphan temp_branch
                  git rm -rf .
                  git reset -- README.md package.json LICENSE dist/**
                  git add README.md package.json LICENSE dist/**
                  git commit -m "Prepare files for release ${{ env.VERSION }}"
              shell: bash

            - name: Create and push tag
              id: create_tag
              run: |
                  git tag ${{ env.VERSION }}
                  git push origin ${{ env.VERSION }}
              env:
                  GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
              shell: bash

            - name: Delete temporary branch
              id: delete_temp_branch
              run: |
                  git checkout main
                  git branch -D temp_branch
              shell: bash

            - name: Release
              uses: softprops/action-gh-release@v2
              with:
                  tag_name: ${{ env.VERSION }}
                  name: Release ${{ env.VERSION }}
                  body_path: release_notes.md
              env:
                  GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}